Evaluating Tectonics Activities of Sirch Basin by Morphometric Indices

Abstract

Sirch basin, in the North of Kerman Province lays vicinity of Naiband fault zone. Approximately there is not where in the world during the years that is not affected by tectonics variation. So, evaluating and investigating tectonics condition, active tectonics processes and consequences of them is very important for human being activities such as design and formation of cities, powerhouses, dams, Industrial foundations, etc. Therefore by using them dangers and losses of these active processes could be minimized. For analyzing tectonic activities of Srich basin, we used morphotectonic reviews to evaluate morphometric indexes have been used to ascertain the tectonic instability/stability. To assess tectonic activities in the area geomorphic indices namely, mountain front sinuosity Smf, the scale of width of bottom of valley to its height VF, curved integral of hypsometry IH, asymmetry of canals in basin area AF, symmetry of transverse topography, index of main river swirls S, and index of evaluating pressure(density) of canals P have been used. In order to calculate these indexes we used digital elevation model, topographic map with a scale of 1:50,000, and geologic map of area (1:100000). Results from morphometric analysis are stated as relative index of active tectonics (RIAT). This index of tectonic activities put an area in four categories of activities: low, medium, high, very high. This index for basin shows extreme rate of activity.